/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the  "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package wx.xml.xalan.xpath.objects;

import wx.xml.xalan.xml.dtm.DTM;
import wx.xml.xalan.xpath.XPathContext;

/*
 *
 * @author igorh
 *
 * Simple wrapper to DTM and XPathContext objects.
 * Used in XRTreeFrag for caching references to the objects.
 */
public final class DTMXRTreeFrag {
    private DTM          m_dtm;
    private int          m_dtmIdentity = DTM.NULL;
    private XPathContext m_xctxt;

    public DTMXRTreeFrag(int dtmIdentity, XPathContext xctxt) {
        m_xctxt = xctxt;
        m_dtmIdentity = dtmIdentity;
        m_dtm = xctxt.getDTM(dtmIdentity);
    }

    public final void destruct() {
        m_dtm = null;
        m_xctxt = null;
    }

    final DTM getDTM() {
        return m_dtm;
    }

    public final int getDTMIdentity() {
        return m_dtmIdentity;
    }

    final XPathContext getXPathContext() {
        return m_xctxt;
    }

    public final int hashCode() {
        return m_dtmIdentity;
    }

    public final boolean equals(Object obj) {
        if (obj instanceof DTMXRTreeFrag) {
            return (m_dtmIdentity == ((DTMXRTreeFrag) obj).getDTMIdentity());
        }
        return false;
    }

}
